17 Questions
What is the primary purpose of the faecal sedimentation technique?
To detect trematode eggs in faeces
What is the ratio of faeces to water in the initial mixture of the sedimentation procedure?
1:15
What is the purpose of adding 10% formalin to the mixture?
To preserve the trematode eggs
What is characteristic of the body of common trematodes?
Flattened body
How many suckers do common trematodes have?
Two
What is unique about the life cycle of trematodes?
They are heteroxenous parasites
Which of the following trematodes has a characteristic cephalic cone?
Fasciola hepatica
What is the size of the egg of Fasciola hepatica?
130-150 µm long by 60-90 µm wide
Which stage of the trematode life cycle is infective?
The Metacercaria
What is the common name of Paramphistomum spp.?
Rumen Fluke
Which of the following trematodes has a flat body shape?
Fasciola hepatica
What is the length of the Cercaria of Fasciola hepatica?
Long and unforked
What is the typical size of a Fascioloides magna in the liver parenchyma?
1 cm
What is the characteristic feature of Schistosoma haematobium eggs?
Presence of a prominent terminal spine at the posterior end
Which of the following is NOT a characteristic of Schistosoma spp. eggs?
Thick-shelled and dark brown in color
What is the typical location of Dicrocoelium dendriticum in the host?
Bile ducts
What is the size range of Schistosoma japonicum eggs?
114 to 180 µm long by 45-70 µm wide
Learn about the sedimentation technique used to detect trematode eggs in faeces. Understand the principles and procedure of faecal sedimentation, including formalin-ether sedimentation. A useful quiz for parasitology and veterinary students.
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